A vessel hull for an inboard-powered marine vessel includes a hull body having a hull bottom that includes a contoured pod mounting surface positioned longitudinally between a central keel and a stern of the hull body. The contoured pod mounting surface has a planar mounting face, for mounting a propulsor pod, and a transition face each positioned between peripheral edges of the pod mounting surface. The transition face slopes forwardly and downwardly from the planar mounting face to the central keel and follows a contour defining a sine wave pattern.

A vessel hull for an inboard-powered marine vessel includes a hull body having a hull bottom that includes a contoured pod mounting surface positioned longitudinally between a central keel and a stern of the hull body. The contoured pod mounting surface has a planar mounting face, for mounting a propulsor pod, and a transition face each positioned between peripheral edges of the pod mounting surface. The transition face slopes forwardly and downwardly from the planar mounting face to the central keel and follows a contour defining a sine wave pattern.

The invention relates to a vessel (1) comprising a hull (2) for non-planing operation, during operation displaying a waterline (3) and having a forward direction in a horizontal plane (4) with a forward portion, an aft portion (5), and a central portion, the aft portion having a smaller water displacement relative to a water displacement of the central portion; and an aft, primary foil (6) affixed to the aft hull portion with a connecting member (7), configured to be below the waterline during operation, spaced from the hull, the aft foil having a span, a chord, a profile, a leading edge (8) and a trailing edge (9) relative to the forward direction, characterized by adjustment means (10) connected to the aft foil and configured for adjusting an angle of incidence (.sub.c, af) of the chord of the aft foil.

A marine vessel has a hull with a bottom, a bow, a stern, and a propulsion arrangement including at least three propulsion units arranged at the stern of the marine vessel. The marine vessel has a base line and a centerline. The at least three propulsion units include a fixed centerline shaft propulsion unit with a shaft line and a propeller, and two turnable propulsion units with respective propellers and arranged at opposite sides of the fixed centerline shaft propulsion unit for steering of the marine vessel. For improving thrust efficiency, while maintaining optimal steering capability, the propeller of the fixed centerline shaft propulsion unit is arranged at a given distance aft of the stern of the marine vessel.

Provided is watercraft hull system, including a hull having a fore end, an aft end, and a longitudinal axis extending between the fore end and the aft end; a substantially V-shaped portion extending from the fore end toward the aft end along a portion of the longitudinal axis; and a substantially M-shaped portion extending from the V-shaped portion toward the aft end, wherein the V-shaped portion gradually transitions to the M-shaped portion.

Provided is watercraft hull system, including a hull having a fore end, an aft end, and a longitudinal axis extending between the fore end and the aft end; a substantially V-shaped portion extending from the fore end toward the aft end along a portion of the longitudinal axis; and a substantially M-shaped portion extending from the V-shaped portion toward the aft end, wherein the V-shaped portion gradually transitions to the M-shaped portion.

A watersports boat includes a hull having an underside extending from a forward bow to n aft transom along a longitudinal centerline. The underside defines a running surface that contacts water when the hull moves therein. The underside includes one or more features that enhance the boat's performance.

A watersports boat includes a hull having an underside extending from a forward bow to n aft transom along a longitudinal centerline. The underside defines a running surface that contacts water when the hull moves therein. The underside includes one or more features that enhance the boat's performance.

Disclosed are a frictional resistance reducing device that effectively reduces the frictional resistance of a ship, and a ship including same. The frictional resistance reducing device comprises: a first air discharge part formed on the leading undersurface of a ship and discharging air into water, a second air discharge part formed behind the first air discharge part and discharging air into water; and an air supplying source supplying air to the first air discharge part and the second air discharge part, wherein the first air discharge part and the second air discharge part are disposed in-line along the lengthwise direction of the ship, and at least a portion of a first air discharge duration of the first air discharge part and at least a portion of a second air discharge duration of the second air discharge part overlap each other.

An outboard motor boat is provided with a hull, a deck, at least one outboard motor and a bulwark. The hull includes a rear portion. The deck is provided on the hull. The at least one outboard motor is mounted to the rear portion of the hull. The bulwark is provided on the deck. The deck includes an aft deck in the rear of the deck. The aft deck includes a first part disposed forward of the outboard motor and a second part extending rearward with respect to the first part in a fore-to-aft direction. The first part is at least partially disposed in a non-overlapping location with respect to the outboard motor and the bulwark as viewed from a side view of the outboard motor boat. The second part extends along a lateral portion of the outboard motor.